123311404442 has 64 divisors (see below), whose sum is σ = 208184100480. Its totient is φ = 54436478976.

The previous prime is 123311404439. The next prime is 123311404481. The reversal of 123311404442 is 244404113321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28299728 + ... + 28304084.

It is an arithmetic number, because the mean of its divisors is an integer number (3252876570).

Almost surely, 2^123311404442 is an apocalyptic number.

123311404442 is a deficient number, since it is larger than the sum of its proper divisors (84872696038).

123311404442 is a wasteful number, since it uses less digits than its factorization.

123311404442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4815.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 123311404442 its reverse (244404113321), we get a palindrome (367715517763).

The spelling of 123311404442 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred four thousand, four hundred forty-two".